Phospholipid bilayer is the <span>component</span> of membrane contains a hydrophobic region and acts as the primary barrier to most foreign substances.
Answer: A) Ocean water evaporates and the warm, moist air rises higher into the atmosphere.
Explanation:
The Equator receives the most direct sunlight on Earth. This makes the water near the Equator, and air above the water, typically warmer than surrounding areas. This warm, moist, less-dense air rises, and then cools as it travels through denser, colder layers. This constant cycle of evaporation and condensation creates an abundance of rain.
So, oceans near the Equator provide ideal conditions for rainfall because ocean water evaporates and the warm, moist air rises higher into the atmosphere.
Answer:
hydrogen bonds and london dispersion force and van der walls forces
Explanation:
these bonds represent weak bond because their bond energy is very less __kj/mole.
Answer: Only options A, B, C and D are true statements
A) One sperm fuses with an egg while the other sperm fuses with the polar nuclei.
B) It results in the formation of a diploid embryo and triploid endosperm.
C) Both sperms involved in double fertilization form within the same pollen tube.
- The diploid nucleus resulting from the second fertilization undergoes meiosis to form the endosperm.
Explanation:
Double fertilization is a process that occurs in only flowering plants. It involves the following:
- A pollen grain produces TWO male gametes
- one male gamete fertilize the egg to form a zygote that is DIPLOID (with two basic sets of chromosomes)
- the second male gamete fuses with another cell named POLAR NUCLEI, to form endosperm (the food storing tissue) in the seed. The endosperm formed is TRIPLOID ( it has three sets of chromosomes), having undergone reductive division - meiosis
Thus, the options A, B, C and D are true statements
Answer: Option A is the correct option.
Cell cannot divide.
Explanation:
Cell cannot divide if centriole is impaired because centriole is cylindrical tube like organelle that is found in eukaryotic cells and it is made up of microtubules and this centrioles help in cell division by cause the chromosomes to separate. They are located close to the nucleus and help in cell division. Therefore, if the centriole is impaired, it will not be able to facilitate cell division since it's ability to to form spindle fiber which separate chromosomes .
